UPSTREAM: leds: Convert to using %pOF instead of full_name

Now that we have a custom printf format specifier, convert users of
full_name to use %pOF instead. This is preparation to remove storing
of the full path string for each node.

Change-Id: I9b3d30eca632d3cfb958f0b31c067f4a6af2d631
Signed-off-by: Rob Herring <robh@kernel.org>
Cc: Richard Purdie <rpurdie@rpsys.net>
Cc: linux-leds@vger.kernel.org
Acked-by: Pavel Machek <pavel@ucw.cz>
Signed-off-by: Jacek Anaszewski <jacek.anaszewski@gmail.com>
Signed-off-by: Wenping Zhang <wenping.zhang@rock-chips.com>
(cherry picked from commit 0571753e65b5bf7fe9a50004e9e1367cc4e51d0a)

Author: robherring

drivers/leds/leds-is31fl32xx.c

@@ -348,8 +348,8 @@ static int is31fl32xx_parse_child_dt(const struct device *dev,
 	ret = of_property_read_u32(child, "reg", &reg);
 	if (ret || reg < 1 || reg > led_data->priv->cdef->channels) {
 		dev_err(dev,
-			"Child node %s does not have a valid reg property\n",
-			child->full_name);
+			"Child node %pOF does not have a valid reg property\n",
+			child);
 		return -EINVAL;
 	}
 	led_data->channel = reg;